Modular compression plant

ABSTRACT

A building structure for operating turbomachinery equipment is disclosed. The building structure includes a first pre-fabricated structure, a second pre-fabricated structure, and a connector attaching the first pre-fabricated substructure to the second pre-fabricated substructure. Each pre-fabricated substructure includes a rigid frame formed from a plurality of linear members. The plurality of linear members forms a first rectangular structure, a second rectangular structure, and connects the first rectangular structure to the second rectangular structure. Each pre-fabricated substructure also includes a noise attenuating sealing panel attached to one or more of the first rectangular structure and the second rectangular structure. The connector includes a spacer plate inserted between first and second pre-fabricated substructures and a fastener. The spacer plate includes an elongated opening extending through the spacer plate. The fastener is inserted through a linear member of each of the first and second pre-fabricated substructures and the elongated opening of the spacer plate. Ancillary systems to support the turbomachinery operation may be housed in the pre-fabricated structures to reduce site construction time and cost.

TECHNICAL FIELD

The present disclosure generally pertains to industrial plants, and ismore particularly directed toward a modular construction and deploymentof an industrial plant housing turbo machinery.

BACKGROUND

Industrial plants housing turbomachinery, such as natural gascompression plants, or oil pumping stations, transport hydrocarbons fromone location to another location. Industrial plants housingturbomachinery may also generate electricity. Such industrial plants arefrequently constructed in remote locations. Construction of these plantsmay require a substantial amount of labor and time, especially incertain regions of the world. Modular construction and deployment of aplant can reduce startup delays, save on labor costs, and ensure optimumoperability.

U.S. Pat. No. 9,115,504, to Wallance, et al., discloses a constructionsystem for erecting building structures comprise a plurality ofprefabricated interconnectable modular building units. Each unitincludes framing members and a plurality of nodes, each node situatedfor selective interconnection with other units. The nodes and theexterior dimensions of the frame conforming to ISO shipping standardssuch that each unit is transportable using the ISO intermodaltransportation system, and such that when the units are interconnected,a building structure is formed. The modular units are assembled at aremote location to a semi-finished state. The semi-finished modularunits are transported from the remote location to the job site, wherethey are secured to form the structure being erected, and thesemi-finished modular units are thereafter constructed to a finishedstate.

The present disclosure is directed toward overcoming one or more of theproblems discovered by the inventors.

SUMMARY OF THE DISCLOSURE

In one embodiment of the present application, a modular buildingstructure for operating turbomachinery equipment is disclosed. Thebuilding structure includes a first pre-fabricated substructure, asecond pre-fabricated substructure, and a connector attaching the firstpre-fabricated substructure to the second pre-fabricated substructure.The first pre-fabricated substructure includes a first rigid frameformed from a plurality of linear members. The plurality of linearmembers includes at least four linear members forming a firstrectangular structure, the first rectangular structure having a firstconnector receiving point, at least four linear members forming a secondrectangular structure, and at least four linear members connecting thefirst rectangular structure to the second rectangular structure. Thefirst pre-fabricated substructure also includes at least one sealingpanel attached to one or more of the first rectangular structure and thesecond rectangular structure. The second pre-fabricated substructureincludes a second rigid frame formed from a plurality of linear members.The plurality of linear members includes at least four linear membersforming a third rectangular structure, the third rectangular structurehaving a second connector receiving point, at least four linear membersforming a fourth rectangular structure, and at least four linear membersconnecting the third rectangular structure to the fourth rectangularstructure. The second pre-fabricated substructure also includes at leastone sealing panel attached to one or more of the third rectangularstructure and the fourth rectangular structure. Sealing panels attachedto the outside members of the substructures are noise attenuating andjoin together to form the walls of the modular building. The connectorincludes a spacer plate inserted between first and second pre-fabricatedsubstructures and a fastener. The spacer plate includes an elongatedopening extending through the spacer plate. The fastener is insertedthrough a linear member of each of the first and second pre-fabricatedsubstructures and the elongated opening of the spacer plate.

In another embodiment of the present application, a pre-fabricatedsubstructure for a modular building structure for operatingturbomachinery equipment is disclosed. The pre-fabricated substructureincludes a rigid frame formed from a plurality of linear members. Theplurality of linear members includes at least four linear membersforming a first rectangular structure, the first rectangular structurehaving a first connector receiving point, at least four linear membersforming a second rectangular structure, and at least four linear membersconnecting the first rectangular structure to the second rectangularstructure. The pre-fabricated substructure also includes at least onesealing panel attached to one or more of the first rectangular structureand the second rectangular structure. Sealing panels attached to theoutside members of the substructures are noise attenuating and jointogether to form the walls of the modular building. The pre-fabricatedsubstructure also a connector configured for attaching thepre-fabricated substructure to a second pre-fabricated substructure. Theconnector includes a spacer plate and a fastener. The spacer plateincludes an elongated opening extending through the spacer plate. Thefastener is inserted through a linear member of the pre-fabricatedsubstructure and the elongated opening of the spacer plate.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a front view of an exemplary modular gas compression plant.

FIG. 2 is a side view of the exemplary modular gas compression plant ofFIG. 1.

FIG. 3 is a plan view of an upper level of the gas compression plant ofFIG. 1.

FIG. 4 is an enlarged view of a first type of connection betweensubstructures of the gas compression plant of FIG. 1.

FIG. 5 is a bottom view of connector receiving portions of twosubstructures of the gas compression plant of FIG. 1.

FIG. 6 is an enlarged view of a second type of connection betweensubstructures of the gas compression plant of FIG. 1.

FIG. 7 is a bottom view of connector receiving portions of asubstructure of the gas compression plant of FIG. 1.

FIG. 8 is an enlarged view of a third type of connection betweensubstructures of the gas compression plant of FIG. 1.

FIG. 9 is another enlarged view, orthogonal to FIG. 8, of the third typeof connection between substructures of the gas compression plant of FIG.1.

FIG. 10 a bottom view of connector receiving portions of two adjacentsubstructures of the gas compression plant of FIG. 1.

FIG. 11 is a top view of a spacer plate used in the first type ofconnection between substructures of the gas compression plant of FIG. 1.

FIG. 12 is a top view of a spacer plate used in the second type ofconnection between substructures of the gas compression plant of FIG. 1.

FIG. 13 is a top view of a spacer plate used in the third type ofconnection between substructures of the gas compression plant of FIG. 1.

FIG. 14 illustrates an example interior of the gas compression plant ofFIG. 1.

FIG. 15 illustrates an example implementation of a substructure used asa local equipment room module in the gas compression plant of FIG. 1.

FIG. 16 illustrates an example implementation of a substructure used asa heating and ventilation module in the gas compression plant of FIG. 1.

FIG. 17 illustrates an example implementation of a substructure used asa temporary workspace module in the gas compression plant of FIG. 1.

FIG. 18 illustrates an example implementation of a substructure used asa Piping and Cable Distribution Module in the gas compression plant ofFIG. 1.

FIG. 19 illustrates an example implementation of a substructure used asa Seal Gas Treatment Module in the gas compression plant of FIG. 1.

FIG. 20 illustrates an example implementation of a substructure used asa Fuel Gas Treatment Module in the gas compression plant of FIG. 1.

FIG. 21 illustrates an alternative example implementation of asubstructure used as a local equipment room module in the gascompression plant of FIG. 1.

FIG. 22 illustrates an example implementation of a substructure used asa Compressed Air Module in the gas compression plant of FIG. 1.

FIG. 23 illustrates an example implementation of a substructure used asa Warehousing Module in the gas compression plant of FIG. 1.

FIG. 24 illustrates an example implementation of a substructure used asa forming a Backup Diesel Generator Module 2400 in the gas compressionplant of FIG. 1.

DETAILED DESCRIPTION

The systems and methods disclosed herein include a building structurefor operating turbomachinery equipment. Such buildings might include agas compression plant for delivering natural gas through a pipeline, anatural gas burning power generation facility for generatingelectricity, a pumping station for delivering oil or gasoline through apipeline, or any other facility that might be apparent to a person ofordinary skill in the art. The building structure may include a firstprefabricated substructure, a second pre-fabricated substructure, and aconnector attaching the first pre-fabricated substructure and the secondpre-fabricated substructure. Each pre-fabricated substructure includes arigid frame formed from a plurality of linear members, the plurality oflinear members forming a pair of rectangular structures connectedtogether by linear members, and at least one sealing panel attached toone or more of the pair of rectangular structures. The connectorincludes a spacer plate inserted between the rectangular structures ofthe first and second pre-fabricated substructures and a fastenerinserted through a linear member of a rectangular structure of the firstand second pre-fabricated substructures and the elongated opening of thespacer plate. Some of the substructures may include turbomachineryancillary equipment installed within the rigid frame. Each of thesubstructures may be transported on a single transportation apparatus.Other equipment and components may be shipped to and assembled at adesignated site.

FIG. 1 is a front view and FIG. 2 is a side view of an exemplary modulargas compression plant 100 (sometimes hereinafter referred to as gascompression facility). Though a gas compression plant is used forexplanatory purposes, example implementations are not limited to a gascompression plant and may alternatively include other types offacilities that might be apparent to a person of ordinary skill in theart. For example, other implementations might include a natural gasburning power generation facility for generating electricity, a pumpingstation for delivering oil or gasoline through a pipeline or any otherfacility that might be apparent to a person of ordinary skill in theart. Some of the surfaces have been left out or exaggerated (here and inother figures) for clarity and ease of explanation.

The gas compression plant 100 may include a plurality of substructures(105, 110) and components. Each substructure (105, 110) may be formedfrom a plurality of linear members 120, 125, 130 arrange to form rigidframes to support sealing panels, which may be noise or soundattenuating panels in some example implementations. For ease ofillustration, the sealing panels have been omitted in FIGS. 1 and 2. Theplurality of linear members 120, 125, 130 include vertical members 120,horizontal members 125, and angled members 130. In some exampleimplementations, each substructure may be formed from a pair ofrectangular structures 135, 140. Each rectangular structure 135, 140 maybe formed from vertical members 120 and horizontal members 125 arrangedin a rectangular configuration. Additionally, the pair of rectangularstructures 135, 140 may be connected to each other by other horizontalmember 125. Additionally, the angled members 130 may be positioned toreinforce the horizontal members 125 and vertical members 120 of eachrectangular structure 135, 140. The vertical, horizontal and angledmembers 120/125/130 may be formed from steel or other iron alloy toprovide sufficient strength and rigidity to allow construction ofsubstructure 105/110 as a well as stacking and shipping of thesubstructures as discussed below.

The substructures (105, 110) can be arranged and stacked in numerousconfigurations, which allows flexibility to scale the gas compressionfacility with the size of the equipment and to allow Balance of Plant(BOP) scope. Some of the substructures (105, 110) may incorporateturbomachinery support systems such as fuel gas treatment, seal gastreatment, compressor piping, unit and surge valves as required, utilityair compressors, backup generator, electrical equipment, as well as allutility distribution systems for air, lube oil, vents, and drains.

The substructures (105, 110) may also be equipped with building supportsystems, including material handling, heating and ventilation, lighting,storage, and fire and gas detection systems. Each substructure (105,110) may be transported complete with the associated piping andelectrical and controls interfaces to facilitate rapid site integration.The substructures (105, 110) may be configured for installation on aconcrete foundation, or, on pilings using a skidded sub-base.

As illustrated, the substructures (105,110) may be stacked in two ormore levels and Additionally, a series of roof support trusses 115 maybe mounted on the substructures (105, 110) to support a roof over thecompression plant 100.

To ensure alignment and to re-enforce gas compression facility 100,connections 145-155 between the substructures (105, 110) may be formedat different locations within the gas compression facility 100. Forexample, connection 145 may be at locations within the gas compressionfacility 100 where the corners of four substructures 105 meet. Further,connection 150 may be used at locations within the gas compressionfacility 100 where corners of only two substructures 105 meet, such asbuilding corners. Additionally, connection 155 may be used at locationswithin the gas compression facility 100 to connect an end of onesubstructure 110 to a region of another substructure 105 locatedseparate from the end. The connections 145-155 are discussed in greaterdetail below with respect FIGS. 4-10.

In some example implementations, the largest size of any substructure(105, 110) may be patterned after the International Organization forStandardization (ISO) freight container standards, but may not meet ISOrequired dimensions. For example, the width of each substructure(105,110) might be is limited to 2.28 m (7 Ft., 6 in.), so that afterapplication of acoustic sealing wall panels the ISO container width of2.4 m (8 Ft.) is not exceeded. Additionally, the height might be limitedto 4.1 m (13 Ft., 6 in.).

In some example implementations, the substructures (105, 110) may havedifferent lengths. For example, each substructure 105 may have a lengthof 13.7 m (45 Ft.), a width of 2.28 m (7 Ft., 6 in.), and a height of4.1 m (13 Ft., 6 in.). Alternatively, substructure 110 may be shorterthan substructure 105 and have a length of 6.1 m (20 Ft.), a width of2.28 m (7 Ft., 6 in.), and a height of 4.1 m (13 Ft., 6 in.). Exampleimplementations of the substructures (105, 110) may have otherdimensions as may be apparent to a person of ordinary skill in the art.

The difference in length between the substructure 105 and thesubstructure 110 may be used to form an access opening 175 to gascompression plant 100 by placing the shorter substructure 110 below thelonger substructure 105. The opening 175 may be formed at the end ofshorter substructure 110 as illustrated.

FIG. 3 is a plan view of an upper level of the gas compression plant100. As illustrated, the gas compression plant 100 may be formed fromtwo levels of six substructures. The upper level is formed entirely ofthe longer substructures 105, arranges in a rectangle 2 substructures105 long by 1 substructure 105 wide. As illustrated with broken lines,the lower level may include one of the shorter substructures 110 at oneend, with five of the longer substructures 105 forming the remainder ofthe lower level. An opening 175 is located at one end of the shortersubstructure 110. The substructures 105, 110 form a perimeter around theinternal area 180 that can house the turbomachinery equipment assembledon site.

FIG. 4 illustrates an enlarged view of the connection 145 used atlocations where four corners of the substructures 105 meet. At thecorner of each of the substructures 105, a connector receiving point 170is formed where two horizontal members 125 and a vertical member 120 ofeach substructure 105 meet. The structure of the connector receivingpoint 170 at connection 150 is discussed in greater detail below. At theconnection 145, the connector 205 connects the connector receivingpoints 170 of the four substructures 105 together. The connector 205includes a spacer plate 210 installed between the connector receivingpoints 170 of the four substructures. The spacer plate 210 is discussedin greater detail below with respect to FIG. 11.

The connector 205 also includes fasteners 215 inserted through theconnector receiving point 170 of one substructure 105, the spacer plate210, and the connector receiving point 170 of an adjacent substructure105. In some example implementations, the fastener 215 may be a bolt orthreaded shaft that is held in place by a nut 220 at one or both ends.In other example implementations, other fasteners such as screws, nails,welds, or rivets may be used. Additionally, at the connector receivingpoint 170, a window 225 may be formed in each vertical member 120 toassist with installation and placement of the fastener 215, and nuts220.

FIG. 5 illustrates a bottom view of connector receiving points 170 oftwo substructures 105 at the connection 145. As illustrated, theconnector receiving points 170 may include a pair of holes 185 formedthrough the joining point of two horizontal members 125 of eachsubstructure 105. The placement of the holes 185 within the joiningpoint of the two horizontal members 125 is not particularly limited.Example implementations are not limited to two holes, but may includemore or less than two holes. The fasteners 215 of the connector 205 maybe inserted through the holes 185.

FIG. 6 illustrates an enlarged view of the connection 150 used atlocations where two corners of the substructures 105 meet. As discussedabove with respect to FIGS. 4 and 5, at the corner of each of thesubstructures 105 a connector receiving point 170 is formed where twohorizontal members 125 and a vertical member 120 of each substructure105 meet. The structure of the connector receiving point 170 atconnection 150 is discussed in greater detail below. At the connection150, the connector 605 connects the connector receiving points 170 ofthe two substructures 105 together. The connector 605 includes a spacerplate 610 installed between the connector receiving points 170 of thetwo substructures. The spacer plate 610 is discussed in greater detailbelow with respect to FIG. 12.

The connector 605 also includes fasteners 215 inserted through theconnector receiving point 170 of one substructure 105, the spacer plate210, and the connector receiving point 170 of the adjacent substructure105. In some example implementations, the fastener 215 may be a bolt orthreaded shaft that is held in place by a nut 220 at one or both ends.In other example implementations, other fasteners such as screws, nails,welds, or rivets may be used. Additionally, at the connector receivingpoint 170, a window 225 may be formed in each vertical member 120 toassist with installation and placement of the fastener 215, and nuts220.

FIG. 7 illustrates a bottom view of connector receiving points 170 ofone of the substructures 105 at the connection 150. As illustrated, theconnector receiving points 170 may include a pair of holes 185 formedthrough the joining point of two horizontal members 125 of thesubstructures 105. The placement of the holes 185 within the joiningpoint of the two horizontal members 125 is not particularly limited.Example implementations are not limited to two holes, but may includemore or less than two holes. The fasteners 215 of the connector 205 maybe inserted through the holes 185.

FIGS. 8 illustrates an enlarged view of the connection 155 used atlocations where a corners of a pair substructures 105, 105 meets ahorizontal section of two other substructures 105 meet. As discussedabove with respect to FIGS. 4-7, at the corner of each of thesubstructures 105, a connector receiving point 170 is formed where twohorizontal members 125 and a vertical member 120 of each substructure105 meet. The structure of the connector receiving point 170 atconnection 155 is discussed in greater detail below. The connection 155may also include a connector receiving point 177 formed at a portionalong the length of the horizontal member 125.

At the connection 155, the connector 805 connects the connectorreceiving points 170 of the two substructures 105 and the connectorreceiving points 177 of the other two substructures 105 together. Theconnector 805 includes a spacer plate 810 installed between theconnector receiving points 170 of the two substructures 105 and theconnector receiving points 177 of the other two substructures 105. Thespacer plate 810 is discussed in greater detail below with respect toFIG. 13.

The connector 805 also includes fasteners 215 inserted through theconnector receiving point 170 of one substructure 105, the spacer plate810, and the connector receiving point 170 of the adjacent substructure105. In some example implementations, the fastener 215 may be a bolt orthreaded shaft that is held in place by a nut 220 at one or both ends.In other example implementations, other fasteners such as screws, nails,welds, or rivets may be used. Additionally, at the connector receivingpoint 170, a window 225 may be formed in each vertical member 120 toassist with installation and placement of the fastener 215, and nuts220.

FIG. 9 illustrates another enlarged view of the connection 155orthogonal to the view illustrated in FIG. 8. As illustrated, theconnector 805 also includes fasteners 217 inserted through the connectorreceiving point 177 of one substructure 105, the spacer plate 810, andthe connector receiving point 177 of the adjacent substructure 105. Insome example implementations, the fastener 217 may be a bolt or threadedshaft that is held in place by a nut 222 at one or both ends. In otherexample implementations, other fasteners such as screws, nails, welds,or rivets may be used.

FIG. 10 illustrates a bottom view of connector receiving points 170 and177 of two adjacent substructures 105 at the connection 155. Asillustrated, the connector receiving points 170 may include a pair ofholes 185 formed through the joining point of two horizontal members 125of the substructures 105. The placement of the holes 185 within thejoining point of the two horizontal members 125 is not particularlylimited. Example implementations are not limited to two holes, but mayinclude more or less than two holes. The fasteners 215 of the connector205 may be inserted through the holes 185.

Additionally, the connector receiving points 177 may include a pair ofholes 187 formed a horizontal member 125 of the substructure 105. Theplacement of the holes 187 within the horizontal member is notparticularly limited. Example implementations are not limited to twoholes, but may include more or less than two holes. The fasteners 217 ofthe connector 205 may be inserted through the holes 185.

FIG. 11 illustrates a top view of the spacer plate 210 used in theconnection 145 of FIG. 4. As illustrated the spacer plate includes aplate body 1105. In some example implementations, the plate body 1105may have a generally rectangular shape. However, example implementationsare not limited to this configuration and may have other configurationsthat may be apparent to a person of ordinary skill in the art.

The spacer plate 210 may be formed from steel or other iron alloy toprovide sufficient strength and rigidity to allow construction ofsubstructure 105/110 as a well as stacking and shipping of thesubstructures 105/110.

Additionally, the spacer plate 210 may also include a plurality ofelongated openings 1110 configured to receive the fasteners 215. Asillustrated, the spacer plate 210 includes four elongated openings 1110,but example implementations may have more or less than four elongatedopenings 1110. The elongated openings 1110 may provide flexibility inaligning the four substructures 105 being connected by the connection145.

FIG. 12 illustrates a top view of the spacer plate 610 used in theconnection 150 of FIG. 6. As illustrated the spacer plate includes aplate body 1205. In some example implementations, the plate body 1205may have a generally rectangular shape. However, example implementationsare not limited to this configuration and may have other configurationsthat may be apparent to a person of ordinary skill in the art.

The spacer plate 610 may be formed from steel or other iron alloy toprovide sufficient strength and rigidity to allow construction ofsubstructure 105/110 as a well as stacking and shipping of thesubstructures 105/110.

Additionally, the spacer plate 610 may also include a plurality ofelongated openings 1210 configured to receive the fasteners 215. Asillustrated, the spacer plate 610 includes two elongated openings 1210,but example implementations may have more or less than two elongatedopenings 1210. The elongated openings 1210 may provide flexibility inaligning the two substructures 105 being connected by the connection150.

FIG. 13 illustrates a top view of the spacer plate 810 used in theconnection 155 of FIG. 8. As illustrated the spacer plate includes aplate body 1305. In some example implementations, the plate body 1305may have a generally rectangular shape. However, example implementationsare not limited to this configuration and may have other configurationsthat may be apparent to a person of ordinary skill in the art.

The spacer plate 810 may be formed from steel or other iron alloy toprovide sufficient strength and rigidity to allow construction ofsubstructure 105/110 as a well as stacking and shipping of thesubstructures 105/110.

Additionally, the spacer plate 810 may also include a plurality ofelongated openings 1310 configured to receive the fasteners 215 and 217.As illustrated, the spacer plate 810 includes four elongated openings1310, 1315, but example implementations may have more or less than fourelongated openings 1310, 1315. The elongated openings 1310, 1315 mayprovide flexibility in aligning the four substructures 105 beingconnected by the connection 145. As illustrated, some of the elongatedopenings 1315 may be oriented orthogonal to the other elongated openings1310.

FIG. 14 illustrates an example interior of a gas compression plant 100according to an example implementation of the present application. Asillustrated, several systems may be attached to the interior structureof the gas compression plant 100 and could be shared between thesubstructures 105 on the upper level. For example, an overhead bridgecrane 1400 may be installed by mounting runways 1405 to substructures105 on either side of the gas compression plant 100. The runways 1405may be supported by haunches 1410 that are attached to the verticalmembers 125. A bridge beam 1415 or other crane support frame may bemounted between the runways 1405. A trolley 1420 or other lift mechanismmay mounted on the bridge beam 1415 a coupled to a hook or other liftattachment mechanism to connect to equipment that may require lifting ormovement within the gas compression plant 100. The runways 1405, bridgebeam 1415 and trolley 1420 may be shipped loose for assembly at site.

Lighting fixtures 1425 may also be installed within one or more of thesubstructures 105 and wired to an external power supply such as agenerator on site. Additionally, fire or gas detectors 1430 may also beinstalled within one or more of the substructures 105 and wired to anexternal power supply such as a generator on site.

FIG. 15 illustrates an example implementation of a substructure 105 thatcan be used as a local equipment room module 1500 external to the gascompression plant and connected by electrical conduit and other supplyconnections 1505. The electrical equipment and battery systemsassociated with the compression equipment and BOP may be located in thelocal equipment room module 1500. When the local equipment room module1500 is separately located it may be placed in a non-hazardous area toavoid ignition of flammable gas associated with the gas compressionplant. Though the local equipment room module 1500 is illustratedexternal to the gas compression plant in FIG. 15, the local equipmentroom module 1500 could also be incorporated as one of the substructures105 within the gas compression plant 100 of FIG. 1. If the localequipment room module 1500 is incorporated into the gas compressionplant 100, it may be fabricated to be air-tight and have apressurization system to guarantee no ingress of flammable gases.

FIG. 16 illustrates an example implementation of a substructure 105 thatcan be used as a heating and ventilation module 1600. As illustrated,the vertical members 120, horizontal members 125, and angled members 130form the substructure 105 framework. Additionally, sealing panels 1605,1610, 1615, 1620 are mounted on the vertical members 120 and horizontalmembers 125. In some example implementations, the sealing panels 1605,1610, 1615, 1620 may be noise or sound attenuating panels. Sealing panel1605 may be an end panel mount on an end of the substructure 105 and mayinclude a door opening 1625. Sealing panels 1615 and 1620 may be ceilingand floor panels mounted on the upper and lower parts of thesubstructure 105. Sealing panel 1610 may be a side panel mounted on theside of the substructure 105. The sealing panel 1610 may have openings1630 for heating and ventilation system components 1635, 1640. Theheating and ventilation system components 1635, 1640 may utilizes supplyfans 1645 on one component 1635 in a heating and ventilation module 1600located on one end of the gas compression plant 100 (shown in FIGS.1-3), and a component 1640 of a heating and ventilation module 1600 withexhaust louvers and dampers on the other end of the gas compressionplant 100 (shown in FIGS. 1-3). A heating system may be integrated intothe supply fan modules 1635 and is located in the same heating andventilation module 1600. The heating and ventilation system components1635, 1640 will be installed in the heating and ventilation module 1600prior to shipment to a job site. Power cables, rain hoods, and pipingconnecting the heating and ventilation module 1600 to the remainder ofthe gas compression plant 100 (shown in FIGS. 1-3) may be installed onsite.

FIG. 17 illustrates an example implementation of a substructure 105 thatcan be used as a temporary workspace module 1700. As illustrated, thevertical members 120, horizontal members 125, and angled members 130form the substructure 105 framework. Additionally, sealing panels 1705,1710, 1715, 1720 are mounted on the vertical members 120 and horizontalmembers 125. In some example implementations, the sealing panels 1705,1710, 1715, 1720 may be noise or sound attenuating panels. The sealingpanels 1705 may be an end panel mount on an end of the substructure 105and may include a door opening 1725. Sealing panels 1715 and 1720 may beceiling and floor panels mounted on the upper and lower parts of thesubstructure 105. Sealing panel 1710 may be a side panel mounted on theside of the substructure 105.

The temporary workspace module 1700 may include a standing desk 1730,paper/record storage such as bookcases 1735 and file cabinets 1740, orany other supplies that the user may want to store at the gascompression plant. The sealing panels 1705, 1710, 1715, 1720 of thetemporary workspace module 1700 can be lined with sound attenuationmaterial.

The standing desk 1730, paper/record storage such as bookcases 1735 andfile cabinets 1740 may be installed in the temporary workspace module1700 prior to shipment a job site. Power cables and piping connectingtemporary workspace module 1700 to the remainder of the gas compressionplant 100 (shown in FIGS. 1-3) may be installed on site.

FIG. 18 illustrates an example implementation of a substructure 105 thatcan be used as a Piping and Cable Distribution Module 1800. Asillustrated, the vertical members 120, horizontal members 125, andangled members 130 form the substructure 105 framework. Additionally,sealing panels 1805, 1810, 1815, 1820 are mounted on the verticalmembers 120 and horizontal members 125. In some example implementations,the sealing panels 1805, 1810, 1815, 1820 may be noise or soundattenuating panels. The sealing panels 1805 may be an end panel mount onan end of the substructure 105. Sealing panels 1815 and 1820 may beceiling and floor panels mounted on the upper and lower parts of thesubstructure 105. Sealing panel 1810 may be a side panel mounted on theside of the substructure 105.

The piping and cable distribution module 1800 may include auxiliarysystems for the compressor train such as lube oil separating equipment1825. These systems may require pipe and cable to be routed through thesubstructure 105. Building systems such as glycol heating also requirepiping to be routed through the substructure 105. The modules, such asthe piping and cable distribution module 1800 that make up the gascompression plant (shown in FIGS. 1-3) may be fabricated withpre-defined routes for piping and cable tray, allowing for pre-assemblyand seamless integration at the Customer site.

FIG. 19 illustrates an example implementation of a substructure 105 thatcan be used as a Seal Gas Treatment Module 1900. As illustrated, thevertical members 120, horizontal members 125, and angled members 130form the substructure 105 framework.

The Seal Gas Treatment Module 1900 may be used to coalesce liquids andfilter the gas, and raise the temperature to at least 50F above thehydrocarbon dew point, before it is delivered to a compressor skid.Additionally, the Seal Gas Treatment Module 1900 may be used wheneverthe available seal gas has components that could condense in the dry gasseals, or particles above the limits stated in performance standards forequipment used in the gas compression plant 100 (shown in FIGS. 1-3).

Like the piping and cable distribution module 1800, the Seal GasTreatment Module 1900 may include pipe 1905 and/or cable routed throughthe substructure 105. The Seal Gas Treatment Module 1900 may alsoinclude seal gas treatment equipment 1910 integrated within thesubstructure 105. The seal gas treatment equipment 1910 may include: acoalescing filter, an electric heater; and any necessary valves, drainand venting piping.

For example, a dual coalescing filter stage may be used to separate theliquid/solid phase/particles from the gaseous phase inside the gasstream. The coalescing filter stage may be designed for automaticdraining of the liquid phase. The coalescing filter stage may includecontinuous pressure differential monitoring and pressure safety valveswill be provided to protect the equipment from over pressurization.

Additionally, a single electric gas heater may increase and control thetemperature of the gas in order to avoid condensation inside the dry gasseals. The heater and its control may be designed to follow all normaland emergency operating conditions during GT operation. A pressuresafety valve may be provided with the gas heater to protect theequipment from over pressurization. Additionally, a heater bypass may beincluded to allow for short term continued operation during heatermaintenance. Dual electric heaters may also be used when superheating orelemental Sulphur may be encountered.

Further, the seal gas treatment equipment 1910 may also includeautomatic isolation (e.g., Shut down valve (SDV)) or purge valves ifrequired by fire or building codes or desired by plant operator.

The seal gas treatment equipment 1910 may be installed in Seal GasTreatment Module 1900 prior to shipment to a job site. Power cables andpiping connecting Seal Gas Treatment Module 1900 to the remainder of thegas compression plant 100 (shown in FIGS. 1-3) may be installed on site.

FIG. 20 illustrates an example implementation of a substructure 105 thatcan be used as a Fuel Gas Treatment Module 2000. As illustrated, thevertical members 120, horizontal members 125, and angled members 130form the substructure 105 framework. Additionally, sealing panels 2005,2010, 2015, 2020 are mounted on the vertical members 120 and horizontalmembers 125. In some example implementations, the sealing panels 2005,2010, 2015, 2020 may be noise or sound attenuating panels. The sealingpanel 2005 may be an end panel mount on an end of the substructure 105.Sealing panels 2015 and 2020 may be ceiling and floor panels mounted onthe upper and lower parts of the substructure 105. Sealing panel 2010may be a side panel mounted on the side of the substructure 105 and mayinclude a door opening 2025. The sealing panels 2005, 2010, 2015, 2020may be opaque in some example implementations to provide privacy tooccupants as illustrated in FIG. 20. In other example implementations,the sealing panels 2005, 2010, 2015, 2020 may be transparent asillustrated in other figures.

Fuel Gas Treatment Module 2000 may be used in the gas compression plant100 (shown in FIGS. 1-3) when the available fuel has components thatcould condense in the fuel system or particles above the limits statedin equipment standards. For example, the Fuel Gas Treatment Module 2000may be used to coalesce liquids and filter the gas, and raise thetemperature to at least 50F above the hydrocarbon dew point, before itis delivered to a Gas Turbine.

Like the Seal Gas Treatment Module 1900, the Fuel Gas Treatment Module2000 may include pipe and/or cable routed through the substructure 105.The Fuel Gas Treatment Module 2000 may also include fuel seal gastreatment equipment 2030 integrated within the substructure 105. Thefuel seal gas treatment equipment 2030 may include: a Single HorizontalCoalescing filter 2035, a Single Electric heater 2040, a Glycol heatexchanger, Inlet SDV and Blow Down Valve (BDV) (as required by code toenable fuel gas system isolation and depressurization), inlet regulator,pre-filter and preheating equipment, and as well as valves, drain andventing pipes.

For example, a horizontal coalescing filter 2035 may be used to allowthe vessel to be the smallest diameter, and placed flat against thesealing panel 2020 of the Fuel Gas Treatment Module 2000. Additionally,filter replacement may be easier if horizontal, rather than the verticalas in certain instances the substructure 105 height may limits verticalfilter replacement headroom. Alternatively, vertical filter replacementmay require overhead tackle or access.

In some example implementations, the coalescing filter 2035 may be adual coalescing filter stage that may separate the liquid/solidphase/particles from the gaseous phase inside the gas stream. Thecoalescing filter 2035 will be designed for automatic draining of theliquid phase. The coalescing filter 2035 may be provided with continuouspressure differential monitoring. Further, pressure safety valves willbe provided to protect the coalescing filter 2035 from overpressurization.

Further, the electric heater 2040 may also be horizontal as this allowsfor easy bundle replacement in some example implementations. In otherexample implementations, vertical placement may be used if bundlereplacement is made possible. In some example implementations, electricheater 2040 may be by-passable to allow for short term continuedoperation during heater maintenance. The electric gas heater 2040 mayincrease and control the temperature of the gas in order to avoidcondensation inside the fuel gas lines up to the injector nozzle basedon equipment standard and gas line design temperature requirements. Theelectric gas heater 2040 and its control may be designed to follow allnormal and emergency operating conditions during Gas turbine operation.In some example implementations, a pressure safety valve may be providedto protect the equipment from over pressurization.

Additionally, a glycol heat exchanger with bypass control may beincorporated in place of the electric heater. The glycol heat exchangermight have a pipe in pipe configuration, or may have a shell and tubeconfiguration depending on the heater size.

FIG. 21 illustrates an alternative example implementation of asubstructure 105 forming a local equipment room module 2100 incorporatedinto the gas compression plant 100. As illustrated, the substructure 105is formed by vertical members 120, and horizontal members 125. Though,not illustrated in FIG. 21, angled members may also be incorporated inthe substructure 105 framework. Additionally, sealing panels 2105, 2110,2115, 2120 are mounted on the vertical members 120 and horizontalmembers 125. In some example implementations, the sealing panels 2105,2110, 2115, 2120 may be noise or sound attenuating panels. The sealingpanel 2105 may be an end panel mount on an end of the substructure 105.Sealing panels 2115 and 2120 may be ceiling and floor panels mounted onthe upper and lower parts of the substructure 105. Sealing panel 2110may be a side panel mounted on the side of the substructure 105 and mayinclude a door opening 2125.

The electrical equipment 2130 and battery systems associated with thecompression equipment and BOP may be located in the local equipment roommodule 2100. When the local equipment room module 2100 is incorporatedinto the gas compression plant 100 as illustrated, the local equipmentroom module 2100 may be fabricated to be air-tight and have apressurization system to guarantee no ingress of flammable gases.

FIG. 22 illustrates an example implementation of a substructure 105forming a Compressed Air Module 2200 incorporated into the gascompression plant 100. As illustrated, the substructure 105 is formed byvertical members 120, and horizontal members 125. Though, notillustrated in FIG. 22, angled members may also be incorporated in thesubstructure 105 framework. Additionally, sealing panels 2205, 2210,2215, 2220 are mounted on the vertical members 120 and horizontalmembers 125. In some example implementations, the sealing panels 2205,2210, 2215, 2220 may be noise or sound attenuating panels. The sealingpanel 2205 may be an end panel mount on an end of the substructure 105.Sealing panels 2215 and 2220 may be ceiling and floor panels mounted onthe upper and lower parts of the substructure 105. Sealing panel 2210may be a side panel mounted on the side of the substructure 105 and mayinclude door openings 2225.

The Compressed Air Module 2200 may also include a compressed air system2230. The compressed air system may the compressed air for a Gas turbinepackage when there is no compressed air supply available at a site. Thecompressed air system 2230 may be configured for the combinations asrequired for: a Gaseous fueled Gas Turbine, Combustion air filterself-cleaning, Separation air for dry gas seals and BOP shutdown andcontrol valves.

FIG. 23 illustrates an example implementation of a substructure 105forming a Warehousing Module 2300 incorporated into the gas compressionplant 100. As illustrated, the substructure 105 is formed by verticalmembers 120, and horizontal members 125. Though, not illustrated in FIG.23, angled members may also be incorporated in the substructure 105framework. Additionally, sealing panels 2305, 2310, 2315, 2320 aremounted on the vertical members 120 and horizontal members 125. In someexample implementations, the sealing panels 2305, 2310, 2315, 2320 maybe noise or sound attenuating panels. The sealing panel 2305 may be anend panel mount on an end of the substructure 105. Sealing panels 2315and 2320 may be ceiling and floor panels mounted on the upper and lowerparts of the substructure 105. Sealing panel 2310 may be a side panelmounted on the side of the substructure 105 and may include dooropenings 2325.

The Warehousing Module 2300 may provide storage space for spare partsstorage, tools and calibration equipment, or other supplies that theplant operator at the gas compression plant 100. A single, fullWarehousing Module 2300 may provide approximately 360 sq. ft. of floorspace, and the walls can be furnished with shelves or cabinets 2330.

FIG. 24 illustrates an example implementation of a substructure 105forming a Backup Diesel Generator Module 2400. As illustrated, thesubstructure 105 is formed by vertical members 120, and horizontalmembers 125. Though, not illustrated in FIG. 23, angled members may alsobe incorporated in the substructure 105 framework. Within the BackupDiesel Generator Module 2400, a diesel generator system 2405 including adiesel motor 2410, a generator 2415 connected to the diesel motor by acrankshaft 2420 and a heat dissipation radiator 2425 may be bolted tothe vertical and horizontal members 125. In alternative embodiments, thediesel motor 2410 may be replaced with another type of fuel drive motor,such as a gasoline motor, or any other motor that may be apparent.

The diesel generator system 2405 may be installed in the Backup DieselGenerator Module 2400 prior to shipment to a job site. Power cables andpiping connecting the Backup Diesel Generator Module 2400 to theremainder of the gas compression plant 100 (shown in FIGS. 1-3) may beinstalled on site.

Though a variety of modules have been described relating to theoperation of a gas compression plant, example implementations are notlimited to a gas compression plant and may alternatively include othertypes of facilities that might be apparent to a person of ordinary skillin the art. For example, other implementations might include a naturalgas burning power generation facility for generating electricity, apumping station for delivering oil or gasoline through a pipeline, orany other facility that might be apparent to a person of ordinary skillin the art. Similar modules may be used and customized to the intendedoperation of the building constructed.

INDUSTRIAL APPLICABILITY

Plants for operating turbomachinery equipment have a variety of uses.Such buildings might include a gas compression plant for deliveringnatural gas through a pipeline, a natural gas burning power generationfacility for generating electricity, a pumping station for deliveringoil or gasoline through a pipeline, or any other facility that might beapparent to a person of ordinary skill in the art. These plants may bein very remote locations. For example, gas compression plants may beused for transporting fuel from natural gas deposits through a pipeline.Frequently, natural gas deposits are located in remote areas of theplanet.

Constructing and deploying a gas compression plant or otherturbomachinery equipment plant at such a remote area may be difficultand expensive. For instance, transporting individual panels, pipes, andother construction materials may require a large amount of deliverytrucks. Assembly of the gas compression plant or other turbo machineryequipment from the individual construction materials may take asubstantial amount of manpower and time. Additionally, laborers may haveto travel to the remote area and sleep in special lodging facilitiesjust to build and test the gas compression plant. These factors maylengthen the construction time for a remotely located gas compressionplant.

Using a modular construction system made up of substructures or modulessuch as those illustrated in the above discussed embodiments of theinvention may yield significant advantages. For example, constructing anoperations building that houses turbomachinery equipment in separatesubstructures can allow for efficient delivery and deployment. Each ofthe substructures is fabricated in sizes largely similar to ISOcontainers, which may reduce transportation costs. Other largestructures such as a gas processing structure may also be constructed ofindividual substructures. By constructing the substructures at afabrication facility, laborers do not need to travel and stay extendedperiods of time at the remotely located site in order to construct thegas compression plant. All substructures may be standardized andcustomizable depending on the size of the gas compression plant and/orthe size of the turbomachinery equipment. This can save on equipment andconstruction costs.

Large structures such as the operations building may be placed on avariety of different foundations. For example, the operations buildingmay be placed on a concrete slab. In other instances, the operationsbuilding may be placed on a plurality of pilings. The pilings may betubular members composed of metal or wood. The pilings may be installedin the ground and extend a certain height upwards from the ground. Theplurality of pilings may generally be positioned in a rectangular gridlike format. In certain instances, the plurality of pilings may allowgreater vibrational forces to resonate through the operations buildingcaused by the turbomachinery equipment.

In addition, all components of the modular gas compression plant may betested at the fabrication facility for functional operation. This cansave time later where problems that may occur during initial testing ofthe fully assembled turbomachinery plant at the remote location areinstead found at the fabrication facility. All substructures andcomponents of the modular turbomachinery plant may be efficientlydelivered to the remote site, deployed quickly, and seamlesslyintegrated together.

Further, the substructures 105/110 or modules of the buildingconstruction system may include connection receiving points 170 thatreceive specifically designed connectors 205/605/805 located at cornersand along edges of the substructures 105/110 to allow more efficientalignment of the substructures with respect to each other. Theseconnection receiving points 170 may include windows 225 within thevertical and horizontal support members 120 to allow insertion offasteners 215 through connection receiving points 170 aftersubstructures 105/110 have been placed onsite. The structure of theconnectors 205/605/805 may include one or more spacer plates 210/610/810inserted between adjacent substructures 105/110 to reinforce and supportthe connections between adjacent substructures 105/110.

Additionally, the strength of the connectors 205/605/805 may besufficient in some example implementations to allow stacking of thesubstructures 105/110 in two or more levels and the mounting of a bridgecrane from upper levels of the stacked substructures.

The preceding detailed description is merely exemplary in nature and isnot intended to limit the invention or the application and uses of theinvention. The above description of the disclosed embodiments isprovided to enable any person skilled in the art to make or use theinvention. Various modifications to these embodiments will be readilyapparent to those skilled in the art, and the generic principlesdescribed herein can be applied to other embodiments without departingfrom the spirit or scope of the invention. Thus, it is to be understoodthat the description and drawings presented herein represent a presentlypreferred embodiment of the invention and are therefore representativeof the subject matter which is broadly contemplated by the presentinvention. It is further understood that the scope of the presentinvention fully encompasses other embodiments that may become obvious tothose skilled in the art and that the scope of the present invention isaccordingly limited by nothing other than the appended claims.

What is claimed is:
 1. A modular building structure for operating turbomachinery equipment, the building comprising: a first pre-fabricated substructure including: a first rigid frame formed from a plurality of linear members, the plurality of linear members including: at least four linear members forming a first rectangular structure, the first rectangular structure having a first connector receiving point, at least four linear members forming a second rectangular structure, and at least four linear members connecting the first rectangular structure to the second rectangular structure, and at least one noise attenuating sealing panel attached to one or more of the first rectangular structure and the second rectangular structure; a second pre-fabricated substructure including: a second rigid frame formed from a plurality of linear members, the plurality of linear members including: at least four linear members forming a third rectangular structure, the second rectangular structure having a second connector receiving point, at least four linear members forming a fourth rectangular structure, and at least four linear members connecting the third rectangular structure to the fourth rectangular structure, and at least one sealing panel attached to one or more of the third rectangular structure and the fourth rectangular structure; and a connector attaching the first pre-fabricated substructure to the second pre-fabricated substructure, the connector including: a spacer plate inserted between the first connector receiving point and the second connector receiving point, the spacer plate including at least one elongated opening extending through the spacer plate, and at least one fastener inserted through: one linear member of the plurality of linear members of the first rectangular structure at the first connector receiving point, one linear of the plurality of linear members of the third rectangular structure at the second connector receiving point, and the elongated opening of the spacer plate.
 2. The modular building structure of claim 1, wherein the first connector receiving point is located on a lower surface of the first rectangular structure; and The second connector receiving point is located on an upper surface of the third rectangular structure such that the first pre-fabricated substructure is located on top of the second pre-fabricated substructure.
 3. The modular building structure of claim 1, wherein the first connector receiving point is located on a side surface of the first rectangular structure; and The second connector receiving point is located on an end surface of the third rectangular structure such that the first pre-fabricated substructure is positioned orthogonal to the second pre-fabricated substructure.
 4. The modular building structure of claim 1, wherein the first connector receiving point is located on an end surface of the first rectangular structure; and The second connector receiving point is located on an end surface of the third rectangular structure such that the first pre-fabricated substructure is positioned in linear alignment to the second pre-fabricated substructure.
 5. The modular building structure of claim 1, wherein the first pre-fabricated substructure has a first length, and the second pre-fabricated substructure has a second length longer than the first length.
 6. The modular building structure of claim 1, further comprising: A third pre-fabricated structure including A third rigid frame formed from a plurality of liner members, the plurality of linear members including: at least four linear members forming a fifth rectangular structure, the fifth rectangular structure having a third connector receiving point, at least four linear members forming a sixth rectangular structure, and at least four linear members connecting the fifth rectangular structure to the sixth rectangular structure, and at least one sealing panel attached to one or more of the first rectangular structure and the second rectangular structure; and a second connector attaching the first pre-fabricated substructure to the second pre-fabricated substructure, the connector including: a spacer plate inserted between the first connector receiving point and the second connector receiving point, the spacer plate including at least one elongated opening extending through the space plate, and at least one fastener inserted through: one linear member of the plurality of linear members of the fifth rectangular structure at the third connector receiving point, one linear member of the plurality of linear members of one of the first rectangular structure and the second rectangular structure at fourth connector receiving point, and the elongated opening of the spacer plate.
 7. The modular building structure of claim 6, wherein the first connector receiving point is located on a lower surface of the first rectangular structure; and the second connector receiving point is located on an upper surface of the third rectangular structure such that the first pre-fabricated substructure is located on top of the second pre-fabricated substructure; and wherein third connector receiving point is located on a side surface of the fifth rectangular structure and the fourth connector receiving portion is located on a end surface of the third rectangular structure such that the third pre-fabricated structure is positioned orthogonal to second pre-fabricated substructure.
 8. The modular building structure of claim 6, wherein the first connector receiving point is located on an end surface of the first rectangular structure; and The second connector receiving point is located on an end surface of the third rectangular structure such that the first pre-fabricated substructure is positioned orthogonal to the second pre-fabricated substructure; and wherein third connector receiving point is located on a side surface of the fifth rectangular structure and the fourth connector receiving portion is located on an end surface of the third rectangular structure such that the third pre-fabricated structure is positioned orthogonal to second pre-fabricated substructure.
 9. The modular building structure of claim 1, wherein the first connector receiving point includes a first window formed in the one linear member of the first rectangular structure through which the fastener is inserted; and the second connector receiving point includes a second window formed in the one linear member of the third rectangular structure through which the fastener is inserted.
 10. The modular building structure of claim 1, wherein spacer plate includes two elongated holes extending through the spacer plate wherein a pair of fasteners are inserted through the first rectangular structure, the third rectangular structure, and the elongated openings of the spacer plate.
 11. The modular building structure of claim 1, further comprising a bridge crane mounted on the first pre-fabricated substructure and the second pre-fabricated substructure, the bridge crane comprising: a support frame mounted to the first rectangular structure and the third rectangular structure; a lift mechanism attached to the support frame; and a lift attachment device coupled to the lift mechanism and configured to be lifted by the lift mechanism.
 12. The modular building structure of claim 1, wherein the first pre-fabricated substructure further includes piping and cable trays for industrial equipment attached to the first rigid frame.
 13. The modular building structure of claim 1, wherein the first pre-fabricated substructure further includes at least one of supply fans, exhaust louvers, and dampers attached to the first rigid frame.
 14. The modular building structure of claim 1, wherein the first pre-fabricated substructure may include a back-up electrical generator housed attached to the first rigid frame.
 15. The modular building structure of claim 1, wherein the first pre-fabricated substructure may include a coalescing filter and an electric heater for fuel-gas treatment attached the first rigid frame.
 16. The modular building structure of claim 1, wherein the first pre-fabricated substructure may include an office work space and physical document storage attached to the first rigid frame.
 17. The modular building structure of claim 1, wherein the first pre-fabricated substructure may include a coalescing filter and an electric heater for compressor seal gas attached to the first rigid frame.
 18. The modular building structure of claim 1, wherein the first pre-fabricated substructure may include a sealed, pressurized local equipment room for electrical equipment attached to the first rigid frame.
 19. A pre-fabricated substructure for a modular building structure for operating turbomachinery equipment, the pre-fabricated substructure comprising: a rigid frame formed from a plurality of linear members, the plurality of linear members including: at least four linear members forming a first rectangular structure, the first rectangular structure having a first connector receiving point, at least four linear members forming a second rectangular structure, and at least four linear members connecting the first rectangular structure to the second rectangular structure, and at least one sealing panel attached to one or more of the first rectangular structure and the second rectangular structure; a connector configured for attaching the pre-fabricated substructure to a second pre-fabricated substructure, the connector including: a spacer plate including at least one elongated opening extending through the spacer plate, and at least one fastener inserted through: one linear member of the plurality of linear members of the first rectangular structure at the first connector receiving point, and the elongated opening of the spacer plate.
 20. The pre-fabricated substructure of claim 20, wherein the first connector receiving point includes a window formed in the one linear member of the first rectangular structure through which the fastener is inserted 